This is a render I did in March and had postworked since here and then; now I consider it to be 'ready'^^Rendertime was 3 hrs 15 mins in TG 0.9.19 @3840x2400, postwork all in all ~ 2 hrs 30 mins; terrain made by myself, surfaces and atmo as well.

Me personally find GC much better to work with than WM - but it's a matter of taste, I guess. GC isn't nodebased like WM but layerbased - I think you should just try it. On the GC-homepage you can get a fullworking-testversion, it works for 30 days - enough time to find a conclusion I think